I like a clean user interface. No flying texts, no character or npc names, as few as possible "things" all over my interface allowable.
Final Fantasy XIV 1.0 had auto hide chat log, even Final Fantasy XI had an auto hide chat log.
Final Fantasy XIV A Realm Reborn should also have an auto hide chat log.
Thank you.
p.s. with a player selection "timer" option such as 5 seconds 10 seconds etc.